diff --git a/_pages/en_US/ntrboot.txt b/_pages/en_US/ntrboot.txt
index 94c54f7a08..afff712445 100644
--- a/_pages/en_US/ntrboot.txt
+++ b/_pages/en_US/ntrboot.txt
@@ -25,7 +25,7 @@ Note that carts with a "Time Bomb" will no longer be able to launch `.nds` files
 | [R4i-SDHC B9S](http://www.nds-card.com/ProShow.asp?ProID=574) | $15.99 | | <= 11.6.0 | <= 1.4.5 | Comes pre-flashed with ntrboot; can be flashed back to an NDS flashcart. |
 | [R4iSDHC GOLD Pro 20XX](http://www.nds-card.com/ProShow.asp?ProID=490) | $9.99 | 3.9b: September 3, 2019 | <= 11.6.0 | <= 1.4.5 | All R4iSDHC 20XX flashcarts are identical. |
 | [R4iSDHC RTS LITE 20XX](http://www.nds-card.com/ProShow.asp?ProID=450) | $13.99 | 3.9b: September 3, 2019 | <= 11.6.0 | <= 1.4.5 | All R4iSDHC 20XX flashcarts are identical. |
-| Ace3DS X | | No | <= 11.6.0 | <= 1.4.5 | Comes with a switch to switch between ntrboot ("3DS") and NDS modes |
+| Ace3DS X | | No | <= 11.6.0 | <= 1.4.5 | Comes with a switch to switch between ntrboot ("3DS") and NDS modes. Do not manually flash with ntrboot. |
 | Infinity 3 R4i | | No | <= 11.6.0 | <= 1.4.5 | |
 | R4 3D Revolution | | No | None | None | |
 | R4i Gold 3DS Deluxe "Starter" | | No | 4.1.0 - 4.5.0 | <= 1.4.5 | |